CN104716960B - A kind of digitlization LLC circuit collection control methods based on DSP - Google Patents
A kind of digitlization LLC circuit collection control methods based on DSP Download PDFInfo
- Publication number
- CN104716960B CN104716960B CN201510144658.4A CN201510144658A CN104716960B CN 104716960 B CN104716960 B CN 104716960B CN 201510144658 A CN201510144658 A CN 201510144658A CN 104716960 B CN104716960 B CN 104716960B
- Authority
- CN
- China
- Prior art keywords
- dsp
- llc
- signal
- reference voltage
- conversions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to a kind of digitlization LLC circuit collection control methods based on DSP, this approach includes the following steps：Step 1: DSP acquisition LLC circuit output voltages UoValue, by the voltage data of acquisition and setting reference voltage UmaxComparison, more than setting reference voltage, then LCC circuits are stopped, and are less than setting reference voltage and then carry out A/D conversions, the sampled output signal U obtained after processing to voltage datas；Step 2: DSP is according to sampled output signal UoWith setting reference voltage VrefIt is compared, if Uo≠VrefThen modify to load transfer function coefficient, compensation LLC circuit output voltages Uo, adjust LLC current driving signal frequencies；Step 3: DSP carries out D/A conversions and filtering to digital drive signals, the analog drive signal of LLC circuits is obtained.The acquisition control total digitalization of LLC circuits is realized by DSP, reduces LLC acquisition control circuit costs, while improving the speed and precision of output voltage acquisition, A/D conversions.
Description
Technical field
The present invention relates to a kind of digitlization LLC circuit collection control methods based on DSP, belong to power technique fields.
Background technology
LLC circuits acquisition control mainly uses analogy method to design in the market, and there are component temperature drift, aging, controlling parties
The shortcomings of method falls behind, at the same LLC circuit digitals acquisition control there are A/D conversion rates it is slow, compensation circuit design is complicated the problems such as,
Hinder the development of the acquisition control technology of LLC circuits.
Invention content
For overcome the deficiencies in the prior art, the present invention provides a kind of digitlization LLC circuits acquisition control side based on DSP
Method, acquisition and control of this method by DSP realizations to LLC circuits, improves acquisition precision, the A/D conversion rates of output voltage,
Simplify the design of compensation control circuit.
The technical scheme is that：A kind of digitlization LLC circuit collection control methods based on DSP, this method include
Following steps：Step 1: the value of DSP acquisition LLC circuit output voltages Uo, by the voltage data of acquisition and setting reference voltage
Umax is compared, and more than setting reference voltage, then LCC circuits are stopped, and is less than setting reference voltage and is then carried out A/ to voltage data
D is converted, the sampled output signal Us obtained after processing；Step 2: DSP is according to sampled output signal Uo and setting reference voltage
Vref is compared, and is modified to load transfer function coefficient if Uo ≠ Vref, and LLC circuit output voltage Uo are compensated, and adjusts LLC
Current driving signal frequency；Step 3: DSP carries out D/A conversions and filtering to digital drive signals, the simulation of LLC circuits is obtained
Drive signal.The step 1 includes the following steps：LLC output voltages Uo is by anti-aliasing interference filter and feedback signal Ufb
After accumulation process, DSP sets storage gain parameter a according to accumulation process signal amplitude, makes an uproar by integral, delay process, quantization
1bit digital signals are obtained after sonication；Then stop A/D conversions after A/D conversions digit reaches n, is adopted after digital filtering
Sample output signal U s, wherein n are the preset A/D conversion accuracies of DSP.The feedback signal Ufb is after quantizing noise is handled
It is multiplied by feedback factor k into after crossing D/A feedbacks.The feedback factor k can be changed automatically.The gain parameter a can be repaiied automatically
Change.The step 2 includes the following steps：Step a, by sampled output signal Us and DSP setting reference voltage V ref relatively after
Error signal E (Z) is obtained, DSP obtains transmission function according to Us and E (Z) numerical value, and DSP judges transmission function flag bit；
Step b, when flag bit is 0, transmission function is optimized, until DSP judges that its flag bit is 1；Step c, flag bit is sentenced
After fixed, DSP changes load transfer function coefficient according to sampling output Us, compensates LLC output voltage Uo, adjusts LLC drive signals
Frequency.The transmission function is that the flag bit is sampled signal Us and DSP reference signals Vref during transfer function fitting
The scalarization of departure degree indicates that 1 represents departure degree within the scope of permissible value, and 0, which represents departure degree, which surmounts DSP settings, allows
Value.Delta-sigma A/D sampling processes realize that acquisition, monitoring and A/D to output voltage are converted, and delta-sigma sampling speed is adjusted by DSP
Degree, it is possible to prevente effectively from the component temperature drift of simulated sample mode and previous digital sample mode sample rate are slow, precision not
The problems such as high；2P2Z controls process and compensates design to the data after delta-sigma A/D samplings, by detecting LLC circuit outputs electricity
The parameter for pressing real time modifying 2P2Z control transmission functions adjusts LLC current driving signals into line frequency, reaches and stablize output electricity
The effect of pressure；Data after delta-sigma D/A processes control 2P2Z carry out D/A conversions, filtering, export the drive as LLC circuits
Dynamic signal.
The present invention has following good effect：1. realizing the total digitalization of LLC circuit acquisition controls by DSP, reduce
The cost of LLC acquisition control circuits.2. improving the speed and precision of output voltage acquisition, A/D conversions.3. realizing to output electricity
The quick compensation and adjusting of pressure, driving signal frequency, stabilize the output voltage.4, flag bit is introduced, 2P2Z controls is optimized and passes
The derivation of delivery function, DSP change the parameter of 2P2Z control transmission functions, realize the automatic adjustment of LLC driving signal frequencies.
Description of the drawings
Fig. 1 is the method flow diagram of the specific embodiment of the invention；
Fig. 2 is the delta-sigma sampling algorithm flow chart of the specific embodiment of the invention；
Fig. 3 is the 2P2Z control algolithm flow charts of the specific embodiment of the invention.
Specific implementation mode
Below against attached drawing, by the description of the embodiment, each component that the specific implementation mode of the present invention is for example involved
Shape, construction, the mutual alignment and connection relation between each section, the effect of each section and operation principle, manufacturing process and
Operate with method etc., is described in further detail, to help those skilled in the art to inventive concept of the invention, technology
Scheme has more complete, accurate and deep understanding.
Fig. 1 is the algorithm flow chart of the present invention, and specific workflow is as described below：Delta-sigma A/D samplings are defeated to LLC circuits
Go out voltage Uo to be acquired, collected voltage data is compared with the DSP reference voltages being arranged, if being set more than DSP
Maximum reference voltage level Umax, LLC circuits are stopped, otherwise carry out A/D conversions to voltage data；Delta-sigma A/D samplings
Afterwards, 2P2Z controls are compared delta-sigma A/D sampling and outputting voltages Uo with the reference voltage V ref of 2P2Z control settings, if Uo
≠ Vref, DSP control the parameter in transmission function to 2P2Z and are adjusted, and compensate LLC current driving signals, reach adjusting and drive
Dynamic signal frequency, the effect stabilized the output voltage；Delta-sigma D/A carries out D/A to the digital drive signals after 2P2Z control compensation and turns
It changes and filters, obtain the analog drive signal Uin of LLC circuits.Data after delta-sigma D/A processes control 2P2Z carry out D/A turns
It changes, filter, export the drive signal as LLC circuits.
Fig. 2 is delta-sigma sampling algorithm flow chart of the present invention, and LLC output voltages Uo is by anti-aliasing interference filter and feedback
After signal Ufb accumulation process, DSP according to accumulation process signal amplitude set storage gain parameter a, by integral, delay process,
1bit digital signals are obtained after quantization.When A/D is converted after digit reaches n, (wherein n is the preset A/D conversions essence of DSP
Degree), then stop A/D conversions, sampled output signal Us is obtained after digital filtering.Delta-sigma A/D sampling processes are realized to output voltage
Acquisition, monitoring and A/D conversion, by DSP adjust delta-sigma sample rate, it is possible to prevente effectively from the member of simulated sample mode
The problems such as device temperature drift and previous digital sample mode sample rate are slow, precision is not high；
Fig. 3 is 2P2Z control algolithms flow chart of the present invention, by the reference voltage V ref of sampled output signal Us and DSP settings
After obtain error signal E (Z), DSP obtains 2P2Z transmission functions DSP to transmission function flag bit according to Us and E (Z) numerical value
(flag bit is that sampled signal Us and the scalarization of DSP reference signal Vref departure degrees indicate during transfer function fitting, 1
Departure degree is represented within the scope of permissible value, 0, which represents departure degree, surmounts DSP settings permissible value) judged.When flag bit is
When 0, transmission function is optimized, until DSP judges that its flag bit is 1.After flag bit judges, DSP is defeated according to sampling
Go out Us modification load transfer function coefficients, compensates LLC output voltage Uo, adjust LLC driving signal frequencies.2P2Z controls process to Δ-
Data after Σ A/D samplings compensate design, and transmission function is controlled by detecting LLC circuit output voltage real time modifyings 2P2Z
Parameter, to LLC current driving signals into line frequency adjust, achieve the effect that stabilize the output voltage；
The present invention obtains Anhui Province's tackling of key scientific and technical problems that fund number is NO.1301023003 and fund number is NO.61401004
The project support.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress is used, or without changing
Other occasions are directly applied to by the design of the present invention and technical solution, within protection scope of the present invention.
Claims (5)
1. a kind of digitlization LLC circuit collection control methods based on DSP, which is characterized in that this approach includes the following steps：
Step 1: the value of DSP acquisition LLC circuit output voltages Uo, by the voltage data of acquisition and Umax pairs of reference voltage of setting
Than, more than setting reference voltage, then LCC circuits are stopped, and are less than setting reference voltage and then carry out A/D conversions to voltage data,
The sampled output signal Us obtained after processing；
Step 2: DSP is compared according to LLC circuit output voltages Uo and setting reference voltage V ref, it is right if Uo ≠ Vref
Load transfer function coefficient is modified, and LLC circuit output voltage Uo are compensated, and adjusts LLC current driving signal frequencies；
Step 3: DSP carries out D/A conversions and filtering to digital drive signals, the analog drive signal of LLC circuits is obtained；
The step 1 includes the following steps：LLC output voltages Uo is by anti-aliasing interference filter and the cumulative places feedback signal Ufb
After reason, DSP sets storage gain parameter a according to accumulation process signal amplitude, by integral, delay process, quantizing noise processing
After obtain 1bit digital signals；Then stop A/D conversions after A/D conversions digit reaches n, sampling output is obtained after digital filtering
Signal Us, wherein n are the preset A/D conversion accuracies of DSP；
The feedback signal Ufb is that laggard cross after D/A is fed back of quantizing noise processing is multiplied by feedback factor k；
The gain parameter a can be changed automatically.
2. the digitlization LLC circuit collection control methods according to claim 1 based on DSP, which is characterized in that described anti-
Feedforward coefficient k can be changed automatically.
3. the digitlization LLC circuit collection control methods according to claim 1 based on DSP, which is characterized in that the step
Rapid two include the following steps：
Step a, error signal E (Z), DSP roots will be obtained after the reference voltage V ref of sampled output signal Us and DSP settings
Transmission function is obtained according to Us and E (Z) numerical value, DSP judges transmission function flag bit；
Step b, when flag bit is 0, transmission function is optimized, until DSP judges that its flag bit is 1；Step c, indicate
After the judgement of position, DSP changes load transfer function coefficient according to sampled output signal Us, compensates LLC output voltage Uo, adjusts LLC
Driving signal frequency.
4. the digitlization LLC circuit collection control methods according to claim 3 based on DSP, which is characterized in that the biography
Delivery function is
5. the digitlization LLC circuit collection control methods according to claim 3 based on DSP, which is characterized in that the mark
Will position is the scalarization expression of sampled signal Us and DSP reference signal Vref departure degrees during transfer function fitting, and 1 represents
For departure degree within the scope of permissible value, 0, which represents departure degree, surmounts DSP setting permissible values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510144658.4A CN104716960B (en) | 2015-03-30 | 2015-03-30 | A kind of digitlization LLC circuit collection control methods based on DSP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510144658.4A CN104716960B (en) | 2015-03-30 | 2015-03-30 | A kind of digitlization LLC circuit collection control methods based on DSP |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104716960A CN104716960A (en) | 2015-06-17 |
| CN104716960B true CN104716960B (en) | 2018-07-24 |
Family
ID=53415976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510144658.4A Active CN104716960B (en) | 2015-03-30 | 2015-03-30 | A kind of digitlization LLC circuit collection control methods based on DSP |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104716960B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111464019A (en) * | 2020-04-09 | 2020-07-28 | 石家庄通合电子科技股份有限公司 | Method and device for optimizing LL C resonant converter load transient dynamics |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707440A (en) * | 2009-11-12 | 2010-05-12 | 中兴通讯股份有限公司 | LLC resonant converter control method, synchronous rectification control method and device |
| CN101800475A (en) * | 2010-03-22 | 2010-08-11 | 艾默生网络能源有限公司 | Link logic control (LLC) resonant converter control method and control device |
| CN102025266A (en) * | 2009-06-18 | 2011-04-20 | 力博特公司 | Numeric control method for liquid level control (LLC) resonant conversion circuit |
| CN102223077A (en) * | 2011-06-08 | 2011-10-19 | 浙江大学 | Sliding-mode controller of LLC (logic link control) series resonance DC-DC converter and control method thereof |
| CN104467443A (en) * | 2015-01-06 | 2015-03-25 | 山东鲁能智能技术有限公司 | Super-wide output voltage range charger based on LLC topology and control method |
-
2015
- 2015-03-30 CN CN201510144658.4A patent/CN104716960B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025266A (en) * | 2009-06-18 | 2011-04-20 | 力博特公司 | Numeric control method for liquid level control (LLC) resonant conversion circuit |
| CN101707440A (en) * | 2009-11-12 | 2010-05-12 | 中兴通讯股份有限公司 | LLC resonant converter control method, synchronous rectification control method and device |
| CN101800475A (en) * | 2010-03-22 | 2010-08-11 | 艾默生网络能源有限公司 | Link logic control (LLC) resonant converter control method and control device |
| CN102223077A (en) * | 2011-06-08 | 2011-10-19 | 浙江大学 | Sliding-mode controller of LLC (logic link control) series resonance DC-DC converter and control method thereof |
| CN104467443A (en) * | 2015-01-06 | 2015-03-25 | 山东鲁能智能技术有限公司 | Super-wide output voltage range charger based on LLC topology and control method |
Non-Patent Citations (1)
| Title |
|---|
| 基于DSP2812的LLC谐振变换器设计;姜红超等;《电力电子技术》;20110430;第45卷(第4期);第28-29页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104716960A (en) | 2015-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106571787B (en) | A kind of numerical model analysis automatic gain control amplifier | |
| CN103616650A (en) | Superconducting magnetic compensation device and method based on predistortion | |
| CN1518793A (en) | Automatic optimization of linearity for envelope feedback amplifier linearization | |
| CN107147392B (en) | TIADC mismatch error calibration method based on adaptive filtering and Taylor series | |
| CN105698992B (en) | Torque sensor and its measurement method built in a kind of high-precision Harmonic Gears | |
| CN100481729C (en) | Method and device for increasing A/D converter signal noise ratio | |
| CN104716960B (en) | A kind of digitlization LLC circuit collection control methods based on DSP | |
| CN109690939A (en) | Configurable control loop topology for pulse width modulation amplifier | |
| CN112650350B (en) | High-precision online adjustable reference voltage generation circuit and method | |
| CN105262405B (en) | Closed loop disturbance observation compensation method for servomotor electric current loop | |
| CN102480446B (en) | Receiver equalizer correcting device and method | |
| CN101587181B (en) | Wideband digital telemetered signal isolating and matching method | |
| CN110083083A (en) | A kind of level auto-adjusting circuit based on analog multiplier and integrator | |
| CN109540176A (en) | A kind of silicon micro-gyroscope Sigma Delta detection closed-loop control system structure and parameter tuning method | |
| CN110401431A (en) | A kind of frequency following Digital Discrete filter, implementation method and its application | |
| CN203337725U (en) | Sampling circuit for network side phase voltage in grid connected photovoltaic inverter system | |
| CN202043080U (en) | Broadband direct current amplification device | |
| CN102829878B (en) | Direct-current bias amplifying circuit based microwave radiometer channel voltage control method | |
| CN203261536U (en) | Power supply | |
| CN113098523B (en) | Digital delta-sigma and PID based double-loop control method and high-precision alternating current source | |
| CN107765075A (en) | A kind of current signal processing unit | |
| CN109194312B (en) | Correcting system and method for realizing standard signal output value based on PWM signal | |
| CN203590168U (en) | Gain control circuit | |
| CN109245534B (en) | Digital proportional-integral-differential compensation circuit based on double signal paths | |
| CN203965986U (en) | A kind of numerical control adjustable D. C regulated |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230925 Address after: Floor 1, building 4, Jinan new material Industrial Science Park, 988 Shunxing Road, Tianqiao District, Jinan City, Shandong Province Patentee after: Shandong Deyuan Electric Power Technology Co.,Ltd. Address before: 241000 No. 1, Beijing East Road, Anhui, Wuhu Patentee before: ANHUI NORMAL University |
|
| TR01 | Transfer of patent right |